West Ham committed to nearly £155m in transfers to sign nine players in the summer window and may yet add a 10th. The world of football transfers is expensive business, especially if you get it wrong. West Ham have found that out to their cost in recent years with some signings that have cost them dear. The likes of Sebastien Haller and Felipe Anderson were sold on for massive losses by West Ham. And £77m worth of investment Nayef Aguerd, James Ward-Prowse and Maxwel Cornet were loaned out on deadline day. There have been some excellent signings too of course. And big profit made on homegrown …